EC has established a team as far as I know who now only works with the "older generation" pre Eurocopter designs. On their last visit I was told they are looking at certifying a optional SB for the Makila. It will involve more than the engine itself as I do not think the 330 drivetrain left standard will handle the Makila's rate of acceleration once she gets going.
As to the taxi issues. If a Squirrel had wheels it would probably behave the same with too much right pedal. So, do we adjust our behaviour and do not use that right pedal too much or do we want the manufacturer to provide us with a less effective tail rotor. When I go hot and high and heavy-I'll adjust my taxi and take all the tail rotor I can get.